Experiments and Simulations of Complex Sugar-Based Coil-Brush Block Polymer Nanoassemblies in Aqueous Solution

Area of Science:

• Polymer Chemistry
• Supramolecular Chemistry
• Materials Science

Background:

• Amphiphilic block polymers are crucial for self-assembly into nanostructures.
• Controlling polymer architecture is key to directing self-assembly.
• Glucose-based polymers offer biocompatibility and unique properties.

Purpose of the Study:

• To investigate molecular parameters governing supramolecular assembly of glucose-based amphiphilic coil-brush polymers.
• To elucidate architecture-morphology relationships using experimental and simulation tools.
• To enable predictive design of nanostructures from this polymer platform.

Main Methods:

• Synthesis of norbornenyl-functionalized poly(glucose carbonate) (NB-PGC) macromonomers via ring-opening polymerization (ROP).
• Sequential ring-opening metathesis polymerization (ROMP) to create coil-brush polymers with tunable dimensions.
• Hydrolysis of NHS moieties to yield amphiphilic polymers.
• Experimental characterization of solution assembly and nanostructure formation.
• Coarse-grained simulations to model polymer assembly and validate experimental findings.

Main Results:

• A series of coil-brush polymers with independently controlled brush and coil dimensions were synthesized.
• Amphiphilic polymers exhibited hydrophilic-hydrophobic ratios dependent on relative dimensions.
• Experimental assembly yielded diverse, structurally dependent nanostructures.
• Simulations showed qualitative agreement with experimental phase diagrams, predicting morphologies based on polymer design.
• Simulations provided insights into chain conformations and packing within assembled structures.

Conclusions:

• The study establishes fundamental understanding of molecular parameters influencing glucose-based amphiphilic coil-brush polymer assembly.
• Architecture-morphology relationships were successfully elucidated.
• The findings enable predictive design of nanostructures for this polymer platform.
• This work advances the understanding of complex polymer self-assembly in solution.